The WIAA defines a concussion as a blow to the head or other part of the body that causes the brain to shake inside of the skull. Concussions usually occur because of the rapid acceleration and deceleration of the brain.

The signs and symptoms of a concussion vary between athletes. Athletes don't have to lose conciousness in order to sustain a concussion. In fact, only about 10 percent of athletes who get a concussion lose conciousness.

If you suspect your athlete has a concussion, remove them from play immediately and continue to monitor them for 2 to 3 hours after you suspect a concussion. The player must be cleared by a licensed health care provider trained in evaluating and managing brain injuries before they can return to play.